Rock-drilling machine.



PATENTED JUNE 23, 19 3.

J. G. HEIMRIGH. ROCK DRILLING MACHINE.

APPLIUATION FILED DEC. 30, 1902.

2 SHEETS-SHEET 1.

N0 MODEL.

HEEEEEQQQ a U MhMZZV/MWEEEELB dQ JQ ATTUHNEY PATENTED JUNE 23, 1903.

J. G. HEIMRIGH. ROCK DRILLING MACHINE.

7 APPLIUATION FILED D30. 30, 1902.

2 SHEETS-SHEET 2.

1'0 MODEL INVENTOR l lie. i l l l V Patented June 23,1903. UN TED STATES PATENT OFFICE.

JOHN G. HEIMRIOH, OF SEATTLE, WASHINGTON, ASSIGN OR ,OF ONE-HALF TO JOHN HEIMRIOI-l, OF SEATTLE, WASHINGTON.

ROCK-DRILLING MACHINE.

SPECIFICATION forming'part of Letterslatent 0. 731,569, dated June 23, 1903.

' Application filedDecember 3( 1902. Serial No. 137,090. (No model.)

To all whom i may 711 ,1 rockdrilling machine embodying myim- Be it known that I, JOHN G. HEIMRICH, a provements. Fig. 2 is a cross-section of same, citizen of the United States, residing at Seat,- taken on line a a of Fig. 1. Fig. 3 is .a horitle, in the county of King and State of Wash.- zontal section on line b b of Figs. 1 .and 2. 55

ington, have invented certain new and useful Fig. 4 is a vertical section on line 0 c of Fig. Improvements in Rock-Drilling Machines, of 2. Fig. 5 is an enlarged fragmentary view of which the following is a specification, referthe front end of the frame, showing the ramence being had therein to the accompanying turning mechanism; and Fig. 6 is a cross-secdrawings. y tion on line at d of Fig. 5. Fig. 7 is a detached 6o 10. This'invention relatesto improvements in sectional view of a detail shown in Fig. 6. 1 machine rock-drills,and more particularly to Fig. 8 is a perspective view of the rain-actudrills driven by a motor integrally connected ating lever.

to the drill-frame. 1 In the said drawings the numeral 2 indi The objects of the invention are to provide, cates the tubular chambered portion, and 3 65 first, means for cushioning with springs the the crank-casing of the frame, to which is rigconnection between the drill-ram andthe moidly connected the cylinder of a driving-motor; second,.means for engaging the drill-ram tor 4. A feed-screw 5, supported by a yoke between a striking-spring and a recoil or buf- 6", connected by stay-rods from the shell 6, fer spring to cause the drill to strike a vibramoves the frame forward or back,as required, 70 zo-tory blow; third,.means to sta rt the engine by being rotated in a nut 7, secured to the independently of the drill proper and-allow frame. Extending axially through the part the drill-ram tobe thrown into or out of op- 2 of the frame is a ram 8, provided at its forerative engagement, with the motor, as deward end with the usual socket 9 for the resired, relieving the apparatus of cononssive ception of the shank of a drill 10 and having 75 2 5 strain on the partswhen the drill strikes the at its opposite or rear end a threaded reduced rock and also where the drill should stick fast. portion 11, which is screwed into a threaded A still further object of the invention is the socket 12 of a piston 13, reciprocable in a cyprovision of means for injecting water to the lindrical pump-chamber 14 of the frame and face of the drill-hole, thereby preventing the I made water-tight therein by packing-rings 13. 8c drill being clogged or stuck fast in the hole, a i The aforesaid ram, piston, anddrill are pro veryannoying and expensive condition com vided with axial conduits 14, 14, andlt, mon to other machines. p respectively, for the passage of -water there- Heretofore it has, been customary in mathrough from the pump-chamber to the strikchines of this character to employ formotive ing end of the drill. Connection is-made be- 85 power compressed air or electricity con veyed tween a receptacle containing a'supply of wato the machine from a considerable distance, ter and the pump-chamber byaflexible pipe, which necessitates the use of complicated ma- .(not shown in the drawings,) having a suit- V chinery, lines of pipes or wiring, and a loss able foot-valve therein through an opening of t a of energy in transmission, while inmy invena three-way cook 15, screwed into the pump- 0 o tion the power'is applied directly to the drill, head 16. The said cock furnishes means to I thus not only reducing the cost ofthe .appanot only regulate the quantity of water supratus to a minimum, but utilizing the power plied to the pump, but by reversing the same to the fullest extent. the wateris shut 0E and communication made With these and other objects in view my with the atmosphere through .another open- 5 invention consists in certain novel details of ing thereof, thus preventing a vacuum being construction and combination of parts, as will formed in the pump when the water is cut off.

be hereinafter fully described, and finally 17 is aspring-actuated check or suction valve pointed out in the claims. positioned in the pistonto prevent the back- 7 Reference being had to the annexed drawflow of water during the forward travel of the 1c 0 5o ings, forming a part of this specification, Figram and admitting it freely upon the return ure 1 is a longitudinal vertical section of a stroke.

Arranged transversely of and seated in suitable bearings 18 of the machine-frame is a shaft 19, provided near one end with a crankpin 20, which is connected by a rod 21 with the engine-piston 4 and having at its opposite end a fly-wheel 22. A sleeve 23, loosely mounted on, the said shaft, is provided with an integral collar 24 eccentric of its axis and forming a crank-pin, as it were, for a lever 25, vibrating about a pivotal pin 26, which oscillates in bushings 27 of the frame.

28 is a boxing for the eccentric and is slidable in an elongated aperture 29 of the lever. The end of the lever opposite to the said pivotal connection is bifurcated and provided with slots 30 in its extremities for carrying slide-b0Xes 31 to receive projecting trnnnions 32 of a cross-head 33, that is fitted loosely on the said ram. Spiral'springs 34 and 35 are interposed, respectively, between the crosshead and the end 13" of the piston and a collar 36, bearing against a tapering shoulder 8 of the ram. These springs furnish connection between the swinging end of the lever and the ram, whereby the latter is resiliently reciprocated thereby.

37 is a spring located between the pumppiston and the pump-head, which on the back stroke of the ram is compressed and in its reaction starts the reverse or advance stroke.

38 is a buffer-spring placed about the ram near the front end of the frame and by engaging the collar 36 intercepts the blow to prevent the end of the ram-chamber being struck when through any cause the machine has been improperly set as to distance from the rock. Guide-nuts 39 and 40 are provided to keep the ram in alinement and between which nuts I position mechanism for regulating the rotation of the ram and its drill. Such turning mechanism com prises two ratchet-wheels 41 and 41, having each an internal projecting feather 42, which engage with straight and spiral grooves or keyways 43 and 44, respectively, of the ram. Scr wed radially into the frame are sockets 45, containing pawlplungers 46, severally pressed by springs 47 into engagement with ratchet-teeth of said wheels and prevent their revolving in but a single direction. When the ram is drawn back, the spiral groove is operative with one.

of the ratchet-wheels, which being prevented from rotating by its pawl-plunger imparts'a partial turn to the ram,while the other ratchet wheel is inoperative and turns coincidently with the ram by reason of its internal feather being carried with the straight slot and its pawl passing freely over the teeth of its wheel. When the ram, however, is impelled forward, the ram is restrained by the straight groove and its ratchet-wheel from turning and delivers a straight or non-rotative blow.

The aforementioned sleeve 23 is coupled to the shaft 19 by any suitable clutch; but I prefer to make such connection to the said flywheel rather than directly to the shaft, and the device illustrated in Figs. 2, 3, and 4 being quick and positive in its action is well adapted to the purpose I will proceed to describe. It comprises a cone 50, splined to the said sleeve, so as to rotate therewith, but movable longitudinally thereof by a forked lever 50", which is fulcrumed to a support 50, attached to the frame under the ends of adjustable stud-bolts 5l ,screwed through levers 51 to force frictional blocks 52 against the inside of the said fiy-wheel to couple the sleeve and shaft together. The last-named levers are pivotally connected to the frictionblocks by swinging links 53 and hinged at their opposite ends to lugs 54 of a spider 55, loosely fitted inside the fly-wheel. This arrangement of the normally loose sleeve With the clutch device makes it possible to start the ram slowly and gradually accelerate its speed without undue strain or shocks upon the operating parts and also to stop the ram when, for instance, it is desired to change drills without stopping the engine.

Although I illustrate and describe a reciprocating driving-engine, it is apparent that a rotary or other suitable motor may be used instead without departing from the spirit of the invention or sacrificing its advantages, and in the use of rotary motors of any kind the same would, unless its speed was excessive, be preferably connected directly to the driving-shaft.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a rock-drilling machine, the combination with the frame having a cylindrical body portion, a ram reciprocally mounted in said body portion, a cross-head loosely mounted on said ram, spring connections between the cross-head and the ram, a lever pivotally connected adjacent to one end to said frame and provided with an elongated aperture intermediate of its length, sliding connection between the cross-head and the end of the said lever opposite its pivotal end, a shaft extending transversely through the frame, a motor secured to the frame, and the connec tion between the motor and the shaft; of a sleeve loosely mounted on said shaft and passing through the said aperture ofthe lever, an eccentric integral with the sleeve,and positioned'within the said aperture, a boxing for said eccentric, and means to couple the said shaft to the said sleeve.

2. In a rock-drilling machine, thecombi nation with the frame,a reciprocal ram mounted in said frame, a cross-head slidable longitudinally upon said ram, springs interposed between said cross-head and stops upon the ram, means to impart a partial rotation to said ram on the back stroke thereof, a motor secured integrally to said frame, a shaft extending transversely across said frame, and connection between said motor and said shaft, of means to engage or disengage said shaft with the said cross-head, such means com,- prising a sleeve provided integrally with an ICO eccentric portion loosely mounted upon said shaft, a cone splined to and slidably mounted upon said sleeve, means to move the said cone longitudinally of the sleeve, levers carrying blocks adapted to frictionally engage a chambered fly-wheel fixedly secured to the said shaft, said blocks, adj ustment-screws in 1, said levers, a lever pivotally connected adder,

jacent one end to the frame and engaging with its opposite end the said cross-head, and a boxing positioned in an elongatedaperture intermediate the length of the lever for said eccentric of the sleeve.

; head and the end of the said piston, a spring between the cross-head and a collar seated upon a shoulder of the ram, a spring positioned in said pump-cylinder between the head thereof and the piston, and a buffer spring seated upon the advance end of the said chamber of the body and adapted to intercept the forward motion of the said ram by being engaged by said collar of the ram.

4. The herein-described rock-drilling ma chine, comprising a frame, a motor integrally connected to said frame, a shaft having a fly wheel fixedly secured thereto, con-' nection between said motor and shaft for rotating the same, a sleeve looselymounted on said shaft, a cone splined to said sleeve, means to move said cone longitudinally of said sleeve whereby a friction device is forced into or out of engagement with the said fly-wheel, said friction device, a ram provided, respectively, with a straight and a spiral groove reciprocally mounted in said frame, a crosshead slidable upon the ram, resilient connections between the cross-head and the ram, a lever having a bifurcated end carrying boxes in which are journaled lateral trunnions of said cross-head, pivotal connection between the other end of the lever and the frame, an elongated aperture intermediate the ends of said lover, a boxingslidable in said aperture and forming journal-bearing for an eccentric provided on said sleeve, a piston secured to the rear end of ,said ram and operating in a pump-chamber of the frame, said pump-chamber, connection between said pump-chamber and the atmosphere or a water-supply, axial conduits in the said piston, ram and the drill, socketed in the ram, a check-valve positioned in the piston-conduit, a spring between head of the pump-chamber and the piston, ratchetwheels having internal projecting feathers to engage with the said grooves of the ram, and a spring-actuated pawl-plunger for each of said ratchet-wheels, substantially as and for the purposes set forth.

In testimony whereof I affix my signature in presence oftwo witnesses.

JOHN G. HEIMRICH.

Witnesses:

P. O. DORMITZER, PIERRE BARNES. 

